Commercial Refrigeration Certification Practice Test 2026 – Your All-in-One Guide to Success!

The function of a compressor in a refrigeration system is to increase the pressure of the refrigerant. When the compressor operates, it takes in low-pressure refrigerant gas from the evaporator and compresses it into a high-pressure gas. This process raises the temperature and pressure of the refrigerant, enabling it to flow through the system and release heat in the condenser.

Understanding the compressor's role is crucial for appreciating how refrigeration cycles work. After the refrigerant has absorbed heat from the environment in the evaporator, it needs to be compressed so that it can release that heat when it reaches the condenser. Without this pressure increase, the refrigerant wouldn't be able to cycle efficiently through the system, and the refrigeration process couldn't take place.

The other functions mentioned, such as cooling the refrigerant to a gas, maintaining temperature in the evaporator, and absorbing heat from the environment, pertain to different components of the refrigeration cycle and not specifically to the role of the compressor.